US2454147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical apparatus
Assignee: Westinghouse Electric Corp
•
Filing: 1945-02-22
•
Granted: 1948-11-16
•
Expires: 1965-02-22
Abstract
No abstract record available.
Inventors
- 👤 Frederick D Fielder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:23
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/28; H01F27/32; H01F27/322
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1304257A
Cited
US1489303A
Cited
US1703410A
Cited
US1747953A
Cited
US1731867A
Cited
US1955313A
Cited
US2347989A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-16 | 1952-05-17 | 1952-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-16 | 1956-05-17 | 1956-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-16 | 1960-05-17 | 1960-11-16 | $7700.00 | Window Closed / Lapsed |